Method and system for retrieving documents with spoken queries
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United States of America Patent
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Apr 5, 2005
Grant Date -
Oct 30, 2003
app pub date -
Apr 25, 2002
filing date -
Apr 25, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method indexes and retrieves documents stored in a database. A document feature vector is extracted for each document to be indexed. The feature vector is projected to a low dimension document feature vector, and the documents are indexed according to the low dimension document feature vectors. A spoken query is represented as a lattice indicating possible sequential combinations of words in the spoken query. The lattice is converted to a query certainty vector, which is also projected to a low dimension query certainty vector. The low dimension query vector is compared to each of the low dimension document feature vectors to retrieve a matching result set of documents.
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